Mourinho then went further in his assessment of United's performance, claiming he cannot remember his side's attitude being so poor even in a friendly.

"I think so," he added when asked whether this was the most underwhelming display his United team has produced.

"I don't even remember a friendly match where our attitude was so poor. I don't like to anticipate the reactions [to this defeat] because in this moment I don't know what to say.

"We come here to play a Premier League match, to play for three points. I feel really disappointed and if I was a Manchester United supporter, the traditional supporter, I would be really disappointed.